Multiple lathe.



No.80o,35o. YPATENTED sEPT.26,1905.

1 y I. AASLAND.

MULTIPLE LATHE.

APPLIGATON FILED MAY 4, 1904.

- v 4 SHEETS-SHEET 2.

WITNESSES www 2f @www mnngw. l. Glwnu om Pnurmumomumin. wAswNGruu. n. c.

- 25 I f O 13 m; o ou@ PATENTED SEPT. I26, 1905.

I. AASLAND. MULTIPLE LATHE.

'APPLIUATION FILED MAY 4, 1004.

4 SHEETS-SHEET FLE;

JNVENTOR WITN ESSES PAWSNTEDl SEPT. 2e, 1005.

I. AASLAND.

- MULTIPLE LATHB.

APPLICATION FILED MAXI/, 1904.

4 SHEETS-SHEET 4.

Afforn'ey UNITED STATES lPArEi\iT AoEEIoE.

INGEBRET AASLAND, OF MINNEAPOLIS, MINNESOTA, ASSIGNOR OF ONE- i HALF TONELS O. AAMODT, OF SOUTH STILLWATER, MINNESOTA.

MULTIPLE LATHE.l

Specification of Letters Patent. l

Patented Sept. 26, 1905.

Appunti@ tied May 4, 16904. serial No. 206,349.

' the county of Hennepinand State of Minnesota, have invented certainnew and useful lInnprovements in Multiple Lathes, of Whichthe followingis a specification.

My invention relates to multiple lathes, more particularly towood-turning machines into which bars or blocks of wood, previouslysawed, usually into like rectangular prisms, are fed one after anotherand automatically' picked up by the mechanism, presented to formativecutters that are in rapid rotation, and, having received the shapingintended, are finally released or thrown out, enabling the partsconcerned to seize another piece of Wood, upon which the operation isrepeated.

One object of my invention is to provide lcooperating gears moving atdefinite speed with respect to each other by means of which each dlesand gearing mentioned are borne -by a pivoted frame movable toward andfrom the cutter-shaft; and a still further, object is to constructdriving elements vspecially adapted to actuate gearing having theparticular character and arrangement embodied 'in my in vention.

Each constituent element is described in detail and its individualoflice, together with the mode of operation as a whole, fully explainedherein.

I accomplish the objects stated by employing parts formed and associatedas illustrated in the accompanying drawings, of which- Figure 1 is asideview. Fig. 2 represents a fragmentary top plan view. Fig. 3 is avertical seotion of the spindle-carrying parts and gearing for rotatingthev spindles, showing those parts which are xed and those loose uponthe concentric supporting-shaft. Fig. 4 is' an end view of my inventionfrom the right of the first figure. side View ofthe chute and itssupports. Figs. 6, 7, 8, 9, and 10 are explanatory side views ofsucceeding portions of the gearing and illustrate the position andrelation of each gear to that which it drives or by which it is driven.

the lathe centers 23. .these centers are rotative spindles 24, tippedFig. 5 represents a Like numbers refer to like pa'rts in theseveralviews. r

' Considering the drawings, numeral 1 desig- I latesr the machine standor body, of any convenient form or weight, by which the various partsaresupported. A bracket 2 (see Figs. 1 and 2) supports the outboard-bearing3, and ifn line with it are two like bearings 4 and 5,

rising from the top of the machine-stand.

Driving-shaft 6 revolves in the bearings mentioned, being turned bysuit-able belting on the pulley 7. At the right-hand extremity of shaft6 is a belt-pulley 8, and in Fig. 1 the broken lines indicate thebelting, which twists slightly as it runs, connecting pulley 8 andbelt-wheel 9 on inclined worm-shaft 10, journaledin bearings 11 and 12,secured low down on the end of the machine-stand. The twist of the beltfrom shaft 6 to shaft 10 is rendered necessary because the axes of thoseshafts are atV right angles to eachother, as shown. 4 l v f j Toward thelower end of shaft 10 is secured the worm 13, engaging the worm-wheel14, fixed 'on horizontal shaft 15, which extends across the front ofstand 1 and revolves in bearings 16 16, carried by the stand. Shaft 15constitutes the pivotal support of the frame 17, and at the tops of theuprights of frame 17 are bearings 18 for the work-shaft 19, the axis ofwhich is parallel with that of drivingshaft 6. On shaft 19 is anadjustable disk 20, havingl hub 21 and set-screws 22 or some otherdevices for securing it upon the shaft. Projecting from the inner faceof disk 2O at quadrantal points near the periphery are In alinement withcarrying the spindles. Between the two plates of. double disk 26 eachspindle is provided with a fixed collar 27, and between the collars andthe rear plate each spindle possesses an encircling coil-spring 28,acting normally to force the spindles forwardly-that is, towardadjustable disk 2O. Thattendency IOO Fig. 3f illustrates the parts ofthe spring is resisted by the engagement of the buttons 29, terminatingthe spindles at the rear, and the cam-groove 30 on the periphery of thestationary fiat cylinder 31. Cylinder 31 is secured to frame 17 and doesnot revolve. When shaft 19 is revolved, the buttons are compelled tofollow1 the direction of the front wall of the cam-groove, and thespindles are withdrawn as each reaches the lowest position, (shown inFig. 1,) allowing' the work to drop out, and are shot forward again bythe coiled springs when the step 32 in the front wall of the groove ismet with. It is at this point that the work is caught between thecenters from the chute 33 (shown in Fig. 4) or from some other suitablefeeding device. It Will be understood that chute 33 is attached to andmoves with the pivoted frame, and therefore preserves a constantposition with respect to the orbital path of the spindles. The block atthe lower end of the chute is held in such position that when theheadcenters are shot forward by the coiled springs, as explained, theblock receives the point and chisels of the head centrally. Necessarilythe position of the chute and the end piece that prevents the blocksfrom slipping off downwardly must be changed for blocks of differentsize. In practice a larger or smaller chute of like construction issubstituted when required. When one block is taken up by thehead-centers, the remaining blocks are slightly disturbed; but as therevolution or orbital movement of the system of centers is then Veryslow the disturbance is only temporary and the blocks remaining slidedown the chute, the bottom one taking the place of the one just removed.(See Fig. 5.) In the customary manner the chute is arranged to hold thepiece of wood about to be taken in position to be properly centered whencaught between the closing lathe-centers. As the shaft 19 and diskscontinue to turn the springs 28 press the chisels of the head-centersfirmly into the wood and hold it securely for the action of the cutteron driving-shaft 6. The front wall of the cam-groove advances forwardlyafter passing the step, and in order to avoid friction the buttons are'not in contact with the groove after the work is once secu rely helduntil it becomes necessary to separate the centers again.

To rotate the spindles 24, and thereby revolve the pieces of wood to beturned in order that all sides of each piece shall be acted upon by therevolving cutters on driving-shaft 6, the geared spool 34 is introduced.It is loose on shaft 19 and has smaller and larger gears 35 and 36 atits ends. Smaller gear 35 meshes with pinions 37, secured to thespindles, and it will be noted here that gear 35 is thick enough topermit the pinions 37 to move back pinion 38 on horizontal shaft 39,revoluble in bearings 40, supported by the frame 17. Shaft 39 is drivenby a pulley 41 on its extremity outside the. frame belted to a pulley 42on shaft 15, already described as forming the pivotal support of theframe and located near the bottom of the machine. 'lhe worm device forshaft 15 has been described.

There now remain to be described the. means for revolving the system ofspindles with sha ft 19 at variable speed in order that each piece ofwork may be brought within reach of the revolving cutter of shaft 6 andheld to the cutter until completely turned into the desired shape. Onshaft 19 is secured the gear 43, meshing with pinion 44 on shorthorizontal shaft 45, (see Fig. 2,) revolving in bearings 46, secured toswinging frame 17. (See also Fig. 4.) On the same short shaft 45 issecured a gear 47, cceentrically placed with respect to the shaft andengaging a similar eccentric gear 48 on a parallel short shaft49. Of thebearings forshaft 49 but one is shown and marked 50 in Fig. 4. On shaft49 is also secured gear 51, which appears in all the ligures, and thisgear 51 coacts with one end gear 52 of the geared spool 53, which has asecond end gear 54 in engagement with the already-mentioned pinion 38 onshaft 39, from which spool 53 and relating gearing above describedderives power. Spool 53 is secured to the short shaft 55, that turns inbearings 56, fixed on the front of the swinging frame. (See Fig. 1 andFig. 4.)

It may be stated here that the spool-gear 34, described as loose onshaft 19, is restrained from displacementlengthwisebetween double disk26 and gear 43, both of which are secured on shaft 19, as stated.

.ln Fig. 4 is shown a slotted bar 57, attached to the machine-stand, andthrough a washer 58 and the slot a screw 59 is let into the upright ofthe pivoted frame and serves to fix the position of the frame afteradjustment of the spindles toward or from the shaft 6. The object ofadjusting the spindles toward er from the shaft 6 by means of thepivoted frame is to enable work of smaller or larger diameter to beturned.

I do not limit myself to the comparative sizes of the gearing shown andmay under certain circumstances desire to turn the spindles at a higheror lower rate of speed or modify the rate of revolution of the system ofspindles.

With regard tothe operation of my invention, it will be understood thatwhile the spindles, and therefore the work, rotate steadily the systemof spindles and work-shaft 19 rotate at variable speed by reason of theincluded eccentric gears 47 and 48. As the longer radii of gear 48 meetthe shorter radii and forth with the spindles, as described, of gear 47the latter is turned rapidly. When withoutlosingengagement withthegear.The this part of the movement takes place, thc

work is being carried over from the feedlarger gear 36 of the spooltooths with the ICO Y chute to the cutters. As the shorter radii of gear48 meet the longer radii of gear 47 the latter, and therefore the systemof spindles, turns slowly and the work is advanced to the cutters-bymoving the swinging frame the requisite distance toward shaft 6.V Duringthe slowest periods of movement of the system, and there are four suchperiods correspondingto the number of spindles, the buttons 29 reach thestep 32 of the cam-groove and the vspindles are shot forward, taking upblocks from chute 33 one after another. The rate of revolution 'ofthespindle system is more or less rapid in correspondence with theVrotation of gear 47. It is also during the `slower revolution of thespindles that the pieces of wood to be turned are caught up by theclosing spindles, as already stated. Having thus described my invention,what I claim, and desire to lsecure by` Letters Patent. isf l. In amultiple lathe, the combination with a driving-shaft, of a pivotedframe, one end of said frame being movable toward and from saiddriving-shaft, adjustable devices for securing the frame, a work-shaftjournaled in said frame and arranged to lie parallel to saiddriving-shaft in all positions of the frame, lathe-centers arrangedabout the work-shaft and a support for thev lathe-centers adjustablysecured to the work-shaft, head-centers corresponding with thelathe-centers and4 revolving with the work-shaft, and gearing 4supported by the said frame and moving with it whereby the head-centersare continuously rotatedat constant speed and the said workshaftcontinuously rotated at variable-speed. 2. In a multiple lathe, thecombination with a driving-shaft', of a pivoted frame, one end of saidframe being movable toward and from said driving-shaft, adjustabledevices for securing the frame, `a work-shaft journaledin said frame andarranged to lie parallel tothe said driving-shaftin all positions of theframe, lathe-centers arranged about the work-shaft and revolving withthe shaft, movable headcenters corresponding with the lathe-centers andrevolving with the work-shaft, reciprocating devices arranged to operatethe said head-centers, and gearing supported by the said frame andmoving with it whereby the head-centers are continuously rotated atconstant speed and the said work-shaft continuously rotated at variablespeed.

3.' In a multiple lathe, the combination with a driving-shaft, of apivoted frame', one endof l said frame being movable toward and fromsaid driving-shaft, adjustable devices for Securing the frame, awork-shaft journaled in said frame and arranged to lie parallel to thesaid driving-shaft in all positions ofthe frame, lathe-centers arrangedabout the' work-shaft and revolving with the shaft, movable headcenterscorresponding with the lathe-centers and revolving with the work-shaft,means for withdrawing and releasing the head-centers and springsarranged to shootI them individually forward when released, and gearingsupported by the said frame and moving with it whereby-the head-centersare continuously rotated at constant speed-and the said workshaftcontinuously rotated at variable speed.l

4. In a multiple lathe, the combination with a driving-shaft, of apivoted frame, one end of said frame being movable toward and from saiddriving-shaft, adjustable devices for securing the frame, a work-shaftjournaled in .said frame and arranged to lie parallel to the rotated atvariable speed, and a chute ar-` ranged to feed blocks between theAcenters at a point of slowest revolution.

5. In a multiple'lathe, the combination of a swinging frame, awork-shaft journaled in the saidswinging frame, a driving-shaft parallelto said work-shaft, a pivot-shaft supporting the swinging frame andbelted to said workshaft, a Worm-wheel on said pivot-shaft, and

In testimony whereof I affix my signature in` presence of twowitnesses.

, INGEBRETAASLAND.

Witnesses:

F. H. GAHRE, J OHNBAIRD.

IOO

